My iPod Touch 1st gen is working, not perfectly but it works. Problem I have is that the iPod doesn't always know it's connected to anything (when it works fine there's a msg on screen saying "Accessory Connected"). Sometimes unplugging it and plugging in again solves the problem, however the most successful remedy I've found is to connect it while it's already playing music.
Quite annoying really but, once it's on, it's on (...until I turn the ignition off. Then it's pot luck as to whether I have to go through the same rigmaroll again next time it turns on).
Just FYI, I have the F7